Peterbilt 378 Back Up Light Bulb Size
The Peterbilt 378 back up light utilizes 1156 and P21W bulb sizes for the rear illumination system. Available information spans a range from 1988 through 2007 for the specified vehicle components.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
Bulb Size by Year Range
| Years | US Type | EU Type | Shop |
|---|---|---|---|
| 1998-2007 | 1156 | P21W | Check Price |
| 1997 | 1156 | P21W | Check Price |
| 1156 (With Halogen Capsule Headlamps) | P21W | Check Price | |
| 1994-1996 | 1156 | P21W | Check Price |
| 1993 | 1156 | P21W | Check Price |
| 1156 (With Halogen Capsule Headlamps) | P21W | Check Price | |
| 1992 | 1156 | P21W | Check Price |
| 1991 | 1156 | P21W | Check Price |
| 1156 (With Halogen Capsule Headlamps) | P21W | Check Price | |
| 1990 | 1156 | P21W | Check Price |
| 1989 | 1156 | P21W | Check Price |
| 1156 (With 4 Rectangular Headlamps) | P21W | Check Price | |
| 1988 | 1156 | P21W | Check Price |
| 1156 (With Halogen Capsule Headlamps) | P21W | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1156 | Check Price |
| ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W. | P21W | Check Price |